National Chemical & Fertilizer Co. v. Swift & Co.
Opinion of the Court
Complainant brings this suit to restrain the alleged infringement of patent No. 367,732, issued August 2, 1887, covering “the within nitrogenous fertilizing material, consisting of undecomposed, coagulated albuminoids of concentrated tank waters, freed from undue deliquescence and viscidity.” This product it claims to secure by the proper use of a solution of sulphate of iron applied to the “soup” (as tank water is termed), and the whole then subjected to 300° Fahrenheit, preferably by steam, it is then placed in an open vessel, spread out to a thickness of about one inch, and subjected for 10 hours to 350° Fahrenheit, when it will become brittle and easy of pulveriza! ion. The relative proportions of the ingredients are to be ascertained only by experiment. Other chemicals, such as sulphate of aluminum, alum, acetate of lead, and tannin, are admitted approximate equivalents. Complainant originally applied for a patent for the process of manufacturing said product, but the application was denied. Defendant is using the process substantially covered by the Joslin patent, No. 495,042, issued April 11, 1893, as summed up in claim o thereof. The “soup” is first concentrated by evaporation or distillation to the consistency of sirup, and is then termed “stick.” To this substance defendant adds sulphuric acid of 60 per cent, to 66 per cent, strength, to the amount of 2 per cent, of the solids. This, defendant claims, decomposes the “stick.” There is then added, in solution, enough of sulphates obtained by dissolving waste fuller’s earth in sulphuric acid, to amount to 8 per cent, on dry basis, other substances are then added, and the whole dried. Complainant claims by its process to coagulate the albuminoids so as to afford resistance to moisture and freedom from stickiness,-and at the same time preserve all the strength of the “soup” for the fertilizing product, and insists that decomposition, which, it asserts, frees a great part of the valuable properties of the “soup,” is thereby avoided. As above stated, defendant claims that its process includes decomposition, as one of its steps. Complainant replies that the sul-phuric acid used by defendant is so inconsiderable that it has little or no effect, and is only used as a cover to its infringement. From
Case-law data current through December 31, 2025. Source: CourtListener bulk data.